Attachment for screw-making machines



June 5, 1928.

J. E. scHusTER ATTACHMENT FOR SCREW` MAKING'MACHINES ..1TTORNEY.

L" June 5; 1928.

J. E. SCHUSTER ATTACHMENT FOR SCREW MAKING MACHINES Filed Oct. 15, 1926 4 Sheets-Sheet 2 A TTORNE Y.

lJune 5, 1928. 1,672,783

' J. E. SCHUSTER ATTACHMENT `FOR SCREW MAKING MACHINES Filed Oct. l5, 1926 4 Sheets-Sheet 3 a va a N l Q Q; s; N ff "Q 5 i N 1 u "xk:

)une 5, 192s.

J. E. scHusTER ATTACHMENT FOR SCREW MAKING MACHINES Filed oct. 15. 192s 4 sneffs-sheet 4 FII l mlm ATTORNEY.

A ci

Patented June 5, 1928. A

.y N 1,672,183 PATENT OFFICE.

,. .roi-1N E. ,sCHUsTEa OEDETROIT, MICHIGAN.

ATTACHMENT FOR SCREW-MAKING IMIACIJJIINIEIS.`

Application led October 15, 1926. Serial No. 141,774.`

This invention relates to "a screw delivery attachment for use `in connection with machines for producing screws, and has for its object to provide, in a manner as here- 5 inafter set forth, an attachment of such class for picking up the finished screws as they are cutoff and delivering them to a container to overcome the dropping of the screws in a grease and shavings collecting pot, pan or receptacle, as is now the case with respect to the dischargeof completed screws. g A In automatic screw making machinery or machines in general use, the machine cuts the wire into the desired lengths and threads the same. The `completed screws and steel shavings fall` intoy a pan, ,and lduring the operation of the machine this `pan gets partly filled with oil or grease. Later the operator is forced to pick the completed screws out of the mass of oil` and shavings,.l and i wash and free the screws from dirt. `To overcome the foregoing objection, as well as to increase the output of the machine, is the object of an attachniient in accordance with this invention, and such attachment acts to pick up the completed screws and automat-` ical'ly `place thesame in` a container ffree of grease and steel shavlngs. i 3o Further objects of the yinvention are to provide, in a manner as hereinafter set forth, an attachment for thepurpose referred to` and which is driven from the machine with which itis associated, and further whereby the attachment is strong, durable, compact, thoroughly efficient in its use, automatic in its action with respect to the delivery of the completed screws, readily installedl withrespect to the machine with` .whichk it is asso- 40 ciated, and comparatively inexpensivev to setup.

Vith the foregoing and other objects in? view, the invention consists of the novel rconstruction, comblnation and arrangement of parts as hereinafter' more specifically dcscribed and illustrated in the accompanying drawings, whereink is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to vwhich fall within the scope ofthe claims hereunto appended.

In the drawings wherein like reference characters denote corresponding parts throughout the several views:

Figure l is a front elevation of a screw delivery attachment in accordance with this invention.

`Figure 2 is a section on line 2-2 Figure 1.`

Figure 3 is a section online 3-3 Fig- 50 vFigure 4 is a fragmentary View, in side elevation, of a combined grab and delivery mechanism. l

Figure 5 is a fragmentary view, inrear 65 elevation of the combined grab and delivery Y mechanism.

Figure 6 isa fragmentary view, in rear elevatiomof the housing for cylinder."

Figure 7 is a section on'line 7-7 Fig- 70 ure 1. y' y i Figure 8 isa section on line 8-8 `Figure 1. n

Figure 9is a section on line 9-9 Figure 3.' .y 75` -The screw delivery attachment for use in connection with a screw making machine is adapted to` be secured tothe machine with Vwhich it is associated fand further driven `spectively.` The bloc-ks 2, 3 are secured to the portions A, A of the machine frame by hold fast devices 4, f1. The housing 1 is formed intermediate its ends with a spiral slot 5 and is further formed with a length- 95 wise extending. slot 6 which is positioned between one end of the slot 5 and one end of the housingl. The function of the slots 5 and 6 will be presently referred to.

Secured within one endof the housing 1 100 is a stop `member 7 .or rather stop 7 formed of a sleeve of appropriate length. Secured in the other end of the housing 1 is an` `abutment 8 constructed from a flanged collar and Vwith the flange 9ithereof' overlapping that 105 end of the housing 1 into which the abutment 8 is positioned. The stop 7 is of greater length than the abutment 8. The

y stop? is adjustable and is held in adjusted i which are mounted in the body of the housing 1 exterior-ly ofa )pairofblocks 2,3 at one end thereof. The abutment 8 is also adjustable and is held in its adjusted position by a pair of set screws 111 mounted in the body of the housing 1 exteriorly of the other pair of blocks 2, 3.

The housing 1 provides a guide for a cam arm piston 12 and a grab arm piston 13. The istons 12 and 13 move synchronously and or suchv purpose a connecting'rod 14 is employed. The rodv 14 at one end extends through the piston 12 and the latter is adjustably secured to said rod 14. The piston 14 is revolubly mounted on the other end of the rod 14 and to permit of the piston 13 revolving relatively to therod 14, theA latter is provided with an annular peripheral groove 15 in which travels a pair oit'connecting screws 16' carried 'by the piston 13. The rod 14extends into a socket 17fornied in the inner end ofthe iston 13 andthe wall of said socket surrounc s the groove 15. The piston 13 revolves on the rod 14 on the reciproc'ations of the piston 13 within the housing 1. The vpiston 12 is operated and guided in its movement by a cam arm 18 which projects laterally from the piston 12 and through the slot 6. The piston 12 is vadjustably connected to the rod 14 by the set screws 19. The cam arm 18'is adjustably connected tothe piston 12 yby the set screw 20 and which permits of the adjusting of the arm 18 outwardly and inwardly with respect to the slot 6. The cam arm 18 carries a roller 21 and which providesv a rolling friction against the housingr 1, asl the arm 18 travels in the slot 6.y The outer end of the arm 18 carries a roller 22 which provides a rolling contact between the arm 18 and thecam C; The cam C Aactsv on the arm 18 to provide for the shifting of the piston Y12 lengthwise of thehousing 1 and such shift of the piston 12 will provide for the synchronous shifting of the piston 13, but on the shift of the piston 13 that is to say, during the travel thereof, it will be revolved'by a mea-ns to be: presently referred to. Interposed between the abutment 8 and piston 13 is a coiled piston returning spring 23 which acts in conjunction with cam C in returning piston 12 and 13 from grabbing position to discharge position, travel being arrested by stop 7.

The piston 13 is formed withan opening 24 which extends diametrically thereof andv adjustably positioned 'in said opening 24 is the shank25 of a throw arm 26. The shank 25 is adjustably connected to the piston 13 by 'a Vset screw 27 which permits of the adjustment of said arm 26 inwardly and outwardly with respect to the slot 5. The yarm 26 is provided with a roller 28 forming a rolling contact against the housing 1 when arm 26 is carried with the piston 13. The

roller 28 travels in the spiral slot 5. The arm 26 is associated withthe combined grab andl delivery mechanism and onl its travel through the slot 5 it provides for a revolvingmotion of the piston 13. The outer end of the throw arm 26 has adjustablyconnected therewith, bythe set screw 29 a supporting arm for the combined grab and delivery mechanism; The supporting arm 1s referred to generally by the reference character 30, is of yoke shape and consists'of an intermediate portion 31 and a pair of end portions 32, 33. The throw arm 26 is lconnected to the outer end portion 33 of the supporting arm 30.

Associated with' the throw arm 26 and carried by the housing 1, at that end of the slot 5 adjacent the abutment 8, is a dog 34 provided with a slot 35, through which extends a set screw 36 for adjustably positioning or securing the dog 34. When the throw arm 26 reaches the end of its'travel, see position shown of said arm26 in Figure 2, the roller `28 on the throw arm 26, travelling up on thedog 34 provides for a lifting motion to the 'grab springs which/'will be presently referred to and which" permits of the gra springs to rise and grab screw piece on the screw machine, just as said piece istbeing cut oi. 'The grabsprings form elements of the combined grab and delivery mechanisnrto be .hereinafter referred to;

Secured .to that blockj3, ositioned at the end of the-housing 1 in w ich is arranged the stop 7, is a combined 'trip and chute supporting arm 37. The arm 37 is extended in the block `3 referred to and held tightlyfand adjustably by any 'suitable means. Thearm 37 is vertically. adjustable and it further supports a yclevis arm 38, which carries the clevis 39 and said arm "37 -has connected therewith, as at 40a hanger arm 41 for the chute 42 into which the work from the automatic screw machine 4is discharged. Extendin through the4 clevis 39 is a screw pin 42 which carries a trip finger or rod 43, the latter extending through the head of the screw pin'42. VA sleeve 44 surroundsv the headed end of the pin 42 and seats inthe cievis 38 and'through the sleeve 'extends the trip finger 43. A thumb nut 45 engages withthe threaded terminal of the screw pin 42 and tightens the clevis 39 on the clevis pin 38", bringing or clamping sleeve 44, against the clevis 39 thereby holding the trip finger `43 rigid. The function of the tri finger 43 will be presentlyreferred to.

ecombined grab and delivery mechanism is supported from the arm 30, see Figures 4 and 5, and includes a trip dog or latch referred to generally by the reference character-46 and which opposes the intermediate pa-rt'31 ofl said arm. The trip dogr 46 consists of a nose portion 4T and a tail portion' 48. `The nose on the trip dog 46 is arranged at one end thereof and indicated at 49. lhe trip dog 46 is held in position by a controlling spring 50, therefor, that `is to say that thetrip dog46 is held against tho arm 30 by said controlling spring 50 and which alsoacts as a pivot for the dog 46. The controlling spring 50 comprises an intermediate portion 51 anda pair of oppo- 52, 53. The intermediate portion 51 eX- tends through a pair of apertured ears 54 formed onthe trip dog 46 at the junction ot' the portions 47 and 48 thereof, and said intermediate portion 51 also extends through the portion`31 of the arm 3.0.` The intermediate portionj51' provides a pivotfor the dog 46. The intermediate portion 51 is also arranged at each side of the dog 46. The end portion 52 bears against the dog 4j6 and the end portion 53 bears against` the portion 31 of the arm 30, see Figures 4 and` 5. The spring 50 normally acts to maintain the trip dog 46 in set position. p f

Adjustably mounted lon the portion 32 of thearm 30 is a holder for a'pair of oppositely disposed grab springs v56. The holder 55 is formed with` a lengthwise ei:- tending opening 56 through which extends the portion32 of the arInVBO. rl-he holder 55` furthermore isformed with a slot 58 into which extends theinner ends of the grab springs 56.` A setl screw 59 is carried. bythe holder for the `purpose of adjustably connecting it to the said portion32. i

Adjustably secured to the portion 32 of the arm 30, inwardly with respect to the holder 55, is a support 60, carrying a pivottil4 for4 a work. delivery tongue 62 consistingpofva channel-shaped portion 63` and aflat lworlrk deliveringportion 64 see Figures 5 and '7p The pivot 61 extends through the channeli shaped portion 63 see Figure 7` and.. said channel-shaped portion 63 Aextends ingthe path of the nose 49 of the ytripdog v46. TheI delivery portion 64 ofthe element 62 extends between the grab springs 56. The portion 32 of the throw arm 30 extendsfthro-ugh the support and the latter is `.con-

`nected with saidportion 32 by a set screw `67. lThe portion 31 ofthe armBO isproridedwith the `diametrically disposed pin 66 positioned to one side'of theintermediate portion liof lthe spring 50, and mounted on the portion 31. of the arm 30 and bearing against the pin 68 is a coiled spring 69 which also bears. against the channel-shaped portion 63 of. the element 62. 'l`he'inose'4-9.

of the trip dog 46 is held in engagement over the rear end of the element 62 `by the springl 30j The trip finger 43 engages the tail portion 48 of the trip dog 46, which. shifts the nose 49 clear of the element 62 providing for the expansion of the spring 69, whereby the. latter in connection `with thespring 65,

will operate the' element 62 to discharge' for thepassage of set screw 59. The set screw 59 binds the portion 59 of the holder i against the springs 56 so` that they will be v clamped in position or to the holder 55. sitely disposed angle shaped end portions The attachment is operated from the vscrew machine with which it is associated,

drumB and cam are elements of the` screw machine and which operate the tool slide of the machine; 'Iheroller 22 provides a `which operates .the tool slide Vof the screw machine. i

When cam arm` 18 is in the position shown in Figure 1, arm 26 is'travelling towards the dog 34` and, `as the arm 26 `reaches the end of its travel, it is forced `up by running up on the sloping sides of the dog 34 this inturn, pushes grab springs 56up and they spring around the work 66, i i

`just las it is being cutoifyand hold it firmly.` The piece of work 66 is pushed against the portion 64 of the element 62 whereby the forward endl of the element 62 isprushed down and the rear end up, about itspivot. The spring 50 then acts so that the nose 49 thereof will engage one side `of the portion 63 .of `the element 62. The work 66 isheld firmly by :the grab springs 56 until the work is `to `beV discharged therefrom. i As the cam arm 18 continues to travel, cam U and spring 23 force arm18 to travel in the `slot 6 in a direction `towards thestop 7, andas the pistons 12 and 13 are connected together, arm 26 is caused to tra-vel through the spiral slot 5 in a directiontowards stop 7.` The travelling of the arm26 in the spiral slot 5 will impart tothe same a spiral motion,` thereby carrying the combined grab and delivery mechanism andi piece of vwork held in an arcuate path acrossto the opposite or front side of the machine. lVhen the mechanism arrives at the end of its travel. in such direction aforesaid, the trip iinger 43l impacts the curved tail piece of the trip dog 46, shifting theA dog on its pivot against the action.` of the spring 56, and` removingthe nose 49I from engagement with the portion 63 of the element 62, thereby releasing said delivery elelnenttiQ.` and the spring 69 which was under astate of i compression',` will act upon the element 62 and cause the yportion 64 of said element ,the` grab springs 56 :it falls into the chute 42. The grab and delivery mechanism is now ready for `return trip-to its initial 'or normal position for thepurpose of receivingan'other piece of work, and this operationis continuous during" the Vvoperation "of theltool slide and cutting volf mechanism of latter. The grab and deliver ymechanism is positioned with respect to tie screw machine so that when actuated it will grab the piece of work just as it is `being cut oli on `the last operation and then be shifted to discharge the work into the chute.

It is to be understood that although,"an attachment` inl accordance with this invention, as designed primarily for use with screw making machines it -can be employed for machines that make bolts, studs and innumerable other objects, or in other words, a delivery attachment in accordance with this invention can 'be usedin4 connection withv any machine for `which it is found applicable.l v

It isthought that the many advantages of an attachment for screw machines, in accordance with this machine, can be readily understood, and although the preferred embodiment of the invention is as illustrated and described yet it is to be understood that y changes in the details of construction can be had which fall within the scope of the invent-ion as claimed.

lVhat 'I claim is zy 1. A screwdelivery attachment for screw machines comprising a completed screw receiving means, a combined 'screw grabbinr and delivery mechanism, and mea-ns adapted to be operated from the screw machine for shift-ing said mechanism bodily to and from delivery position with respect `to said screw receiving means,` said means including a pair of reciproca'tory pistons vconnected together, arranged in spaced relation and traveling in unison, one of said pistons being rotatable during its travel and carr ing said mechanism for shifting it to and rom delivery posit-ion and the other of said pisf tonsV carrying means adapted to be operated from the screw machineto provide for reciprocation of the pistons, and' supporting means lfor said-pistons kcoacting with said mechanism for shifting it in an arcuate path throughout to and from delivery 'position.

2. A screw delivery attachment for screw machines comprising a completel screw receivinfr means, a combined screw grabbing and'de ivery mechanism, vand meansada'pted novae-B to Abe operated 'from thescrew machine for shifting said mechanismbodily to and from delivery-positionwith respect to said screw receiving means, said means including a air of recprocatory pistons' connected'toget er, arranged in spaced relation and traveling in unison, one of said pistons being rotatable during its travel and carrying said mechanism for shifting it to and romdelivery position and the other of said pistons carrying means adapted' to be operated from the screw machine to'pr'ovide for reciproction of the pistons, and supporting means for said pistons enacting with said mechanism for shifting 'it in an arcuate path throughout to and from deiveryposition,l said mechanism including'a latch-ing mechanism 'for lmaintaining the" delivery means latched during its bodily shifting of the mechanism, and means carried by said screw receiving means for releasing the screw delivery means `'for `the discharge of the screw therefrom.

3. A screw delivery attachment for screw machines comprisinga completed screw receiving means, a combined'screw grabbing and Vdelivery mechanism including a screw grabbing element, and a sprii'i' controlled screw 'delivery device inde endent lof said grabbing element, rotatab e and reci Yro catory means adapted to be operatedv rom the screw machine for bodily shifting said mechanism to Vand 'from `delivery vposition with respect to said screw receivmg means, supporting means for 'said rotatable and reciprocatory means and coacting VVwith said mechanism for bodily'shifting it in `an `Varcuate path throughout to and from delivery position, means for connecting said mechanism to the `means loperated from the screw machine, and means arranged at said screw receiving means for yreleasing said delivery device topr'ovide for its operation to discharge the screw from said grabbingielement. y 1

4. A screw attachment for screw machines comprising a completed screw receiving means, a bodily portable combined screw grabbing and delivery mechanism including resilient screwv grabbing elements, a' sprin controlled latch and a ring controlle screw delivery device move y into latched position with respect to said latch by and when the screw is" grabbed by the grabbing elements, rotatable and reciprocatory means operated from the screw machine and carrying said mechanism for bodily shifting it to van from delivery position with respect to'said screw receiving means', and means arranged at said screw receiving means to` provide for the actuationof the latch to release said delive device where the latter will automatical y operate to orce the screw from said grabbing elements. f A

5. A screw de'live'ryattachment" f ir screw lli) las

rio

' machine and including a rotatable carrying said mechanismand shifting it to` machines comprising a completed'serew receiving means, a bodily portable combinedv screw grabbing and delivery mechanism mcluding resilient screw grabbing elements, a spring controlled latch and a spring controlled screw delivery device moved into latched position with `respect to said latch by and when the screw `1s grabbed by the grabbing elements, a reciprocatory element operated from the screwmachine` and 1ncluding a rotatable member 'connected with said mechanism and providing means for bodily shifting said mechanism to and from delivery position Awith respect to said screw receiving means, and means arranged at the screw receiving means to provide for thc actuation of the latch to release said delivery device whereby the latter will automatically operate to force the screw from said grabbing elements.' y

'6. A' screw delivery attachment for screw machines comprising a` completed screw receiving means, a bodily i portable combined screw grabbing and delivery mechanism including resilient screw grabbing elements, a spring controlled latchand a spring controlled screw deliverydevi'cemoved into latched position with respect to `said latch by andwhen `the screw is ygrabbed Aby the grabbing elements, a reciprocatory element operated from the cluding a rotatable member connected'with said mechanism and providing means for bodilyshiftingr said mechanism to and from delivery position with respect to said screw receiving means, and means arranged at the screw `receiving means to providefor the actuation of the latch to 'releases said delivery device whereby the latter will automatically operate to forcethe screw from said.

grabbing elements, and supporting "means for said reciprocatory elelnent and coacting with said mechanism to provide for the latter to travel in an arcuate path throughout to and from delivery position.

7. A screw delivery attacluneut for screw machines comprising a completed screw receiving means, a bodily portablecombined screw'grabliing and f lelivery mechanism including adju able, resilient screw grabbing s ring controlled latch and an elements, a adjustable, :spring controlled screw delivery device moved into latchedposition with respect to said latch by andwhen `the screw isifgrabbed .by the grabbing elements, a reciprocatoryelementoperated from the screw and from delivery 1position with respect to said yscrew receivingmeans,and means ar-V ranged at the screwrreceiving means `to provide for the actuation of the latch to release said delivery device whereby the latter will automatically operate to force the screw from said grabbing elements. y Y

yspring controlled screw machine and in` member y `8. A serewdelivery attachment for screw machines comprising a completed screw receiving means, a bodil portable combined screw grabbing and de ivery mechanismvincluding resilient screw grabbing elements, a throw arm, a spring controlled latch and a screw delivery device position with respect to when the screw is grabbed elements, means operated from the screw machine and carrying said throw arm for bodily shifting said mechanism to and from delivery position with respect to"said screw receiving means, and means arranged at the screwreceiving means to `provide for the actuation of the latch to release said delivery device whereby the latter will automaticz-illy operate to forcethe screw from said grabbing elements y 9. A screw delivery attachment; for screw machines comprising a completed screw receiving means, a bodily portable combined screw i grabbing and delivery mechanism including resilient screw grabbing elements, a throw arm, a spring controlled latch and a spring controlled screw delivery `device moved into latched position with respect to said latch by and when the screw is grabbed bythe grabbing elements, means operated from the screw machine and carrying said throw arm for bodily shifting said mechanism to and from delivery position with respect to said screw receiving means, and means `arranged at the screw receiving means to provide for the actuation of the latch to release said delivery device whereby the latter will automatically operate to forcethe screw from said grabbng elements, and supporting means for themeans operated from the screw machine and coacting with said throw arm to provide for the travel of said mechanism in an arcuate `path to and from delivery position. i 10. A screw delivery attachment forscrew machines comprising a completed screw receiving means, a bodily portable combfned screw grabbing and delivery mechanism including resilient screw grabbing elements` a throw arm and a spring controlled screw delivery device moved to latched position by and when thescrew bing elements, a pair of reciprocatory pstons connected together and traveling in unison, `one of said pistons bein(r` rotatable and carrying said throw arm or bodily shiftingsaid mechanism to and from deliveryposition with respect to` said screw receivingmeans, means extending from the other offsaid pistons and operated 1from the screw'machine for reciprocating the pistons, supporting'meansfor said pistons and coacting with said throw arm to provide for the travel ci` said mechanism in an arcuate path throughout to and from delivery position, and means arranged at the screw removed into latched said latch by and by the grabbing liu 

